<template>
  <div>
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <div>
        <el-alert title="注意：只允许为第三级分类设置相关参数。" type="warning" :closable="false" show-icon> </el-alert>
        <el-row class="cat_opt">
          <el-col>
            <span>选择商品分类：</span>
            <el-cascader v-model="selectedCateKeys" expand-trigger="hover" :options="cateList" :props="cateProps" @change="cateChange" clearable> </el-cascader>
          </el-col>
        </el-row>
        <el-tabs v-model="activeName" @tab-click="handleTabClick">
          <el-tab-pane label="动态参数" name="many">
            <el-button type="primary" size="mini" :disabled="isButtonDisabled" @click="addAttrDialogVisible = true">添加参数</el-button>
            <el-table :data="manyList" style="width: 100%" border stripe>
              <el-table-column type="expand" width="50">
                <template slot-scope="scope">
                  <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable
                    @close="handleClose(i, scope.row)">
                    {{ item }}
                  </el-tag>
                  <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue" ref="saveTagInput" size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)">
                  </el-input>
                  <el-button v-else class="button-new-tag" size="small"
                    @click="showInput(scope.row)">+ New Tag</el-button>
                </template>
              </el-table-column>
              <el-table-column type="index" width="50"> </el-table-column>
              <el-table-column prop="attr_name" label="参数名称"> </el-table-column>
              <el-table-column label="操作">
                <template slot-scope="scope">
                  <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                  <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteAttr(scope.row.attr_id)">删除</el-button>
                </template>
              </el-table-column>
            </el-table>
          </el-tab-pane>
          <el-tab-pane label="静态属性" name="only">
            <el-button type="primary" size="mini" :disabled="isButtonDisabled" @click="addAttrDialogVisible = true">添加属性</el-button>
            <el-table :data="onlyList" style="width: 100%" border stripe>
              <el-table-column type="expand" width="50">
                <template slot-scope="scope">
                  <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable
                    @close="handleClose(i, scope.row)">
                    {{ item }}
                  </el-tag>
                  <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue" ref="saveTagInput" size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)">
                  </el-input>
                  <el-button v-else class="button-new-tag" size="small"
                    @click="showInput(scope.row)">+ New Tag</el-button>
                </template>
              </el-table-column>
              <el-table-column type="index" width="50"> </el-table-column>
              <el-table-column prop="attr_name" label="参数名称"> </el-table-column>
              <el-table-column label="操作">
                <template slot-scope="scope">
                  <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                  <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteAttr(scope.row.attr_id)">删除</el-button>
                </template>
              </el-table-column>
            </el-table>
          </el-tab-pane>
        </el-tabs>
      </div>
    </el-card>
    <el-dialog :title="'添加' + titleText" :visible.sync="addAttrDialogVisible" width="50%" @close="addAttrDialogClose">
      <el-form :model="addAttrForm" ref="addAttrFormRef" :rules="addAttrFormRules" label-width="140px">
        <el-form-item :label="labelText" prop="attr_name">
          <el-input v-model="addAttrForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addAttrDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addAttr">确 定</el-button>
      </span>
    </el-dialog>
    <el-dialog :title="'修改' + titleText" :visible.sync="editAttrDialogVisible" width="50%" @close="editAttrDialogClose">
      <el-form :model="editAttrForm" ref="editAttrFormRef" :rules="editAttrFormRules" label-width="140px">
        <el-form-item :label="labelText" prop="attr_name">
          <el-input v-model="editAttrForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editAttrDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editAttr">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      cateList: [],
      // 级联选择框配置
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      selectedCateKeys: [],
      activeName: 'many',
      manyList: [],
      onlyList: [],
      addAttrDialogVisible: false,
      addAttrForm: {
        attr_name: ''
      },
      addAttrFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' }
          // { min: 3, max: 15, message: '用户名长度为3到15个字符。', trigger: 'blur' }
        ]
      },
      editAttrDialogVisible: false,
      editAttrForm: {
        attr_name: ''
      },
      editAttrFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' }
          // { min: 3, max: 15, message: '用户名长度为3到15个字符。', trigger: 'blur' }
        ]
      }
    }
  },
  computed: {
    isButtonDisabled () {
      if (this.selectedCateKeys.length !== 3) {
        return true
      } else {
        return false
      }
    },
    catId () {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      } else {
        return null
      }
    },
    titleText () {
      if (this.activeName === 'many') {
        return '动态参数'
      } else {
        return '静态属性'
      }
    },
    labelText () {
      if (this.activeName === 'many') {
        return '动态参数名称：'
      } else {
        return '静态属性名称：'
      }
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        this.$message.error('获取商品分类列表失败。')
      }
      this.cateList = res.data
    },
    cateChange () {
      this.getParamsData()
    },
    handleTabClick () {
      this.getParamsData()
    },
    async getParamsData () {
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        this.manyList = []
        this.onlyList = []
        return
      }
      const { data: res } = await this.$http.get(`categories/${this.catId}/attributes`, { params: { sel: this.activeName } })
      if (res.meta.status !== 200) {
        this.$message.error('获取参数列表失败。')
      }
      console.log(res.data)
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        item.inputVisible = false
        item.inputValue = ''
      })
      if (this.activeName === 'many') {
        this.manyList = res.data
      } else {
        this.onlyList = res.data
      }
    },
    addAttrDialogClose () {
      this.$refs.addAttrFormRef.resetFields()
    },
    addAttr () {
      this.$refs.addAttrFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(`categories/${this.catId}/attributes`, { attr_name: this.addAttrForm.attr_name, attr_sel: this.activeName })

        if (res.meta.status !== 201) {
          return this.$message.error('添加属性失败！')
        }
        this.$message.success('添加属性成功！')
        this.getParamsData()
        this.addAttrDialogVisible = false
      })
    },
    async showEditDialog (attrId) {
      const { data: res } = await this.$http.get(`categories/${this.catId}/attributes/${attrId}`, { params: { attr_sel: this.activeName } })
      if (res.meta.status !== 200) {
        this.$message.error('获取参数信息失败。')
      }
      this.editAttrForm = res.data
      this.editAttrDialogVisible = true
    },
    editAttrDialogClose () {
      this.$refs.editAttrFormRef.resetFields()
    },
    editAttr () {
      this.$refs.editAttrFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put(`categories/${this.catId}/attributes/${this.editAttrForm.attr_id}`, { attr_name: this.editAttrForm.attr_name, attr_sel: this.activeName })

        if (res.meta.status !== 200) {
          return this.$message.error('修改属性失败！')
        }
        this.$message.success('修改属性成功！')
        this.getParamsData()
        this.editAttrDialogVisible = false
      })
    },
    deleteAttr (attrId) {
      this.$confirm('此操作将该属性, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      })
        .then(async () => {
          const { data: res } = await this.$http.delete(`categories/${this.catId}/attributes/${attrId}`)
          if (res.meta.status !== 200) {
            return this.$message.error('删除用户失败。')
          }
          this.$message({
            type: 'success',
            message: '删除成功!'
          })
          this.getParamsData()
        })
        .catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除'
          })
        })
    },
    async handleInputConfirm (row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveAttrVals(row)
    },
    async saveAttrVals (row) {
      const { data: res } = await this.$http.put(`categories/${this.catId}/attributes/${row.attr_id}`,
        {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(' ')
        })
      if (res.meta.status !== 200) {
        console.log(res)
        return this.$message.error('添加失败。')
      }
      this.$message.success('添加成功。')
    },
    showInput (row) {
      row.inputVisible = true
      // 页面重新渲染后，才会执行回调函数
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    handleClose (i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrVals(row)
    }
  }
}
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 15px;
  span {
    font-size: 14px;
  }
}
.el-cascader {
  width: 240px;
}
.el-table {
  margin-top: 15px;
}
.el-tag {
  margin: 4px;
}
.input-new-tag {
  width: 120px;
}
</style>
